Patents by Inventor Arthur L. Leman

Arthur L. Leman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Stretch seal valve
    Patent number: 4076212
    Abstract: An improved valve for high speed, high pressure pumps, having a dished, rectangular-sectioned, radially stretched seal overhanging the valve body to both cushion and seal the body's closure against the valve seat, and which is pre-stressed in tension sufficiently to stiffen against pinch off under the high fluid pressures of, and to attain full elastic shape recovery in the very brief time interval between the valve closings of, such pumps.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: February 28, 1978
    Inventor: Arthur L. Leman
  • Pill box
    Patent number: D281225
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: November 5, 1985
    Assignee: Health Enterprises, Inc.
    Inventor: Arthur L. Leman